One of those utterly useful web-toys the California highway system has on-line...

[wolfwings]

Road Conditions

Example URL for Interstate 5.
Example URL for State Road 101.

And for those of you stuck on data-enabled mobile devices with tiny screens, try here for a flat 'directory of files' interface for the same information.

Comments

[alexismckee.livejournal.com]

Yes, we have similar stuff here. It's quite neat. You can even plot in your daily routes and get an SMS if there's traffic jams or road blocks :)